// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-generator-function-definitions-runtime-semantics-evaluation
es6id: 14.4.14
description: Abrupt completion returned when accessing iterator `return` method
info: |
  YieldExpression : yield * AssignmentExpression

  1. Let exprRef be the result of evaluating AssignmentExpression.
  2. Let value be ? GetValue(exprRef).
  3. Let iterator be ? GetIterator(value).
  4. Let received be NormalCompletion(undefined).
  5. Repeat
     a. If received.[[Type]] is normal, then
        [...]
     b. Else if received.[[Type]] is throw, then
        [...]
     c. Else,
        i. Assert: received.[[Type]] is return.
        ii. Let return be ? GetMethod(iterator, "return").
features: [generators, Symbol.iterator]
---*/

function Test() {
    var thrown = new Test262Error();
    var badIter = {};
    var callCount = 0;
    var poisonedReturn = {
      next: function() {
        return { done: false };
      }
    };
    Object.defineProperty(poisonedReturn, 'throw', {
      get: function() {
        callCount += 1;
      }
    });
    Object.defineProperty(poisonedReturn, 'return', {
      get: function() {
        throw thrown;
      }
    });
    badIter[Symbol.iterator] = function() {
      return poisonedReturn;
    };
    function* g() {
      try {
        yield * badIter;
      } catch (err) {
        caught = err;
      }
    }
    var iter = g();
    var result, caught;

    iter.next();

    assert.sameValue(caught, undefined, '`return` property not accessed eagerly');

    result = iter.return();

    assert.sameValue(result.value, undefined);
    assert.sameValue(result.done, true);
    assert.sameValue(caught, thrown);
    assert.sameValue(callCount, 0, 'iterator `throw` property is not accessed');
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
